Zero Width Joiner (ZWJ) is a Unicode character that joins two or more other characters together in sequence to create a new emoji.
Zero Width Joiner, pronounced "zwidge", is not an emoji and has no appearance by itself. This is an invisible character when used alone.
View Emoji ZWJ Sequences that use this character.
Zero Width Joiner was approved as part of Unicode 1.1 in 1993 and added to Emoji 11.0 in 2018.